Front & Rear Brake Calipers. Warranty does not cover parts installed for an incorrect application. Silver-finished calipers resist rust and corrosion with an OEM-Style look. Ford F-150 1999 4-Wheel Disc Brakes | Base, Lariat, XL, XLT | 4.2L, 4.6L, 5.4L | Rear Caliper Mounted Forward of Axle Front and Rear.